Note: The Ghostscript Installer will create an entry in Registry "HKEY_LOCAL_MACHINE\SOFTWARE\GPL Ghostscript\9.10" which contains GS_DLL & GS_LIB keys and ImageMagick use them to find proper binary to call.

Test Postscript:

Open Laragon's Terminal

Go to Ghostscript's bin folder

cd "C:\Program Files\gs\gs9.10\bin"

Test making pdf file from ps

..\lib\ps2pdf ..\examples\tiger.eps C:\tiger.pdf

You should have the file C:\tiger.pdf

Test converting from PDF to png:

Go to where you extracted ImageMagick, go to its bin folder - where the convert.exe file is located (ImageMagick-6.9.3-7-vc14-x64\bin) and run

Thanks so much for creating the tutorial. I had no problem finding the registry keys (though my version of Ghostscript is 9.22), but had to do some digging around to be able to make the commands work, partly because for some reason Windows is requiring administrator approval to write to the C drive. I had to send the output to my D drive, so I ended up with this command in Laragon's Cmder:

@wpfangirl :
I think it is a bug of ImageMagick as it priorizes the Registry first, then the delegates.xml - I had the same issue. You can ignore it.

Now, you are sure that Ghostcript is working well on your system. You can check the Wordpress plugin code where it gives error message "Ghostcript is not supported" and fix that.
I guess the code tries to call a command to check but fails because of permissions.

@RodrigoAzevedo Thanks, Rodrigo. I had to import hundreds of PDF files as WordPress entries via a particular plugin that uses Ghostscript, so that wouldn't have worked in this case. I did eventually get everything to work, but I don't remember the precise details of how!